Add mystery and depth to your marble runs with the GraviTrax: Expansion – Tunnels! This cleverly designed set introduces enclosed tunnel elements that hide the path of your marbles, creating surprise reveals and adding visual interest. Perfect for builders looking to add a new dimension to their layouts, the Tunnels expansion enhances both function and flair.

• Includes tunnel walls, curved tunnels, and hidden track elements

• Adds visual intrigue and surprise paths to your builds

• Compatible with all GraviTrax Starter Sets (required)

• Great for boosting creativity, spatial awareness, and STEM learning

Take your marble runs underground with the GraviTrax Tunnels Expansion!

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